She says: 'Fundamentally we need some sort of legislation to underscore the principle that these tests are not evidence-based – perhaps an “anti-quackery” clause that all customers must sign before consenting to go through screening,' she said.

She remains a thorn in the side of any organisation using poor medicine to push their agenda. She has had continued successes with the Advertising Standards Agency, which has upheld her complaints against health companies and products, and she has been one of the most vocal opponents of health secretary Jeremy Hunt’s claims that reduced staffing at weekends leads to higher mortality rates.

Alongside her BMJ column and work on BBC Radio 4’s Inside Health, she has released her third book, The State of Medicine. She has begun a Radio Scotland series, Cradle to Grave, and is working on a new series for Radio 4.